water marks

I have used 3M products with great success.
Look at my car:
http://olek.dhs.org/pics/car/set1/
It is almost 5 years old by now. Looks better than new ( well, from the
distance ). :)
Sure, it is not Audi ( considering buying 1991 200, that is why I am here
), but also a great sleeper - 240 horsepower and supercharger hidden
behind "Buick" logo.
For watermarks and for unexperienced person I would recomend 3M SMR
(swirl mark remover). Just use very small amout of it, and rub really
really long - it have to break down for better results.
regards,
Olek